Materials Literature
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In this study, the production of Poly-b-hydroxybutyrate (PHB) was determined in 1 Rhizobium japonicum, 6 Rhizobium cicer, 8 Rhizobium spp. and Bradyrhizobium japonicum USDA 110. The content of according to dry cell weight was determined to be 1.38-40.0%. In our study, Rhizobium spp. 2426, which produced the highest pe…
The static dielectric properties of (001)(GaAs)(p)/(AlAs)(p) superlattices have been calculated as a function of their period p for 1< or = p < or =12, starting from density-functional theory. The interplay between quantum confinement and local field effects is shown to be crucial. For light polarized in the growth di…
An zwei unterschiedlichen Positionen derivatisierbar sind die neuartigen Heteropolymolybdate wie das gezeigte [SeIVMo6O21(O2CCH2NH3)3]2−. Zudem eröffnen die terminalen Aminogruppen der Aminosäuren weitere Funktionalisierungsmöglichkeiten, sodass die hier vorgestellten 18 Verbindungen ideale Kandidaten für das Wirkstof…
Rare earth ion-exchanged zeolites exhibit a tremendous enhancement of luminescence upon treatment with suitable organic complexing agents, as reported here. For Eu3+ exchanged zeolite X, the β-diketone 1-thienyl-4,4,4-trifluoro-1,3-butane-1,3-dione leads to the formation of intra-zeolite complexes. Fully coordinated c…
Negative thermal expansion (NTE) in cubic ${\mathrm{Z}\mathrm{r}\mathrm{W}}_{2}{\mathrm{O}}_{8}$ has generated much interest due to its large, isotropic, and temperature independent behavior. Here, x-ray absorption fine structure data are presented for various atom pairs, providing evidence that the low-energy modes c…
The three-coordinate iron(II) complex, (But-BDI)FeOBut [But-BDI = HC(C(But)N-2,6-iPr2C6H3)2] is found to be a highly active initiator for the polymerisation of lactide and caprolactone at room temperature.
The copolymerization of aryl bis- and tris-trifluorovinyl ether monomers yields aromatic perfluorocyclobutyl (PFCB) polymers, via thermally initiated step-growth cycloaddition chemistry. PFCB polymers and their copolymers enjoy a unique combination of attributes well suited for applications in photonic technologies, s…
Homogeneous magnetic nanoparticles can be synthesised within the constrained volume architecture of Listeria innocua (see Figure). This ferritin-like protein cage provides a limited reaction environment for the synthesis of 5 nm diameter ferrimagnetic iron oxide maghemite nanoparticles. The results suggest a new gener…
Micellization is the precipitation of lipids from aqueous solution into aggregates with a broad distribution of aggregation number. Three eras of micellization are characterized in a simple kinetic model of Becker-Döring type. The model asigns the same constant energy to the $(k-1)$ monomer-monomer bonds in a linear c…
The length of the arms of a nanorod-based architecture can be adjusted from 100 nm up to a micrometer (see Figure) when using the simple one step surfactant-ligand co-assisted solvothermal technique reported here. The arm lengths are controlled by simply changing the relative concentrations of dodecylthiol and ethylen…
Injecting charge into dangling bond wires on Si(001) has been shown to induce polarons, which are weakly coupled to the underlying bulk phonons. We present elevated temperature tight binding molecular dynamics simulations designed to obtain a diffusion barrier for the diffusive motion of these polarons. The results in…
A new $\mathrm{N}\mathrm{H}\mathrm{\ensuremath{\cdots}}\mathrm{N}$ hydrogen-bonded ferroelectric crystal of $[{\mathrm{C}}_{\mathrm{6}}{\mathrm{H}}_{\mathrm{12}}{\mathrm{N}}_{\mathrm{2}}\mathrm{H}{\mathrm{]}}^{\mathrm{+}}\mathrm{R}\mathrm{e}{\mathrm{O}}_{\mathrm{4}}^{\mathrm{\ensuremath{-}}}$ ($\mathrm{d}\mathrm{a}\ma…
Hierarchically ordered macroporous networks (see Figure) composed of TiO2 tubes made of anatase nanocrystals have been fabricated by sol–gel coating of organic eggshell membrane consisting of interwoven shell membrane fibers. The unique hierarchical structure, together with the high surface area and substantial porosi…
Thin films of incompatible block copolymers self-assemble into highly regular supramolecular structures with characteristic dimensions in the 10–100 nm regime. There is increasing interest in controlling the resulting structures and utilizing them, for instance in the area of nanotechnology. So far, research has conce…
We introduce a path to a possibly new class of magnetic materials whose properties are determined entirely by the presence of a low concentration of specific point defects. Using model Hamiltonian and ab initio band structure methods we demonstrate that even large band gap nonmagnetic materials as simple as CaO with a…
In this paper we present the first results on emission in metamaterial. We show how the specific properties of metallic composite material can modify the emission of an embedded source. We show that under proper conditions the energy radiated by a source embedded in a slab of metamaterial will be concentrated in a nar…
The effect of free carriers on dispersion and damping of coupled phonon-plasmon modes is considered in the long-wave approximation. The electron and phonon scattering rate as well as Landau damping are taken into account.
We study the interaction between a one dimensional magnetic nanostructure and a thin film superconductor. It is shown that different magnetic distributions produce characteristic magnetic field signatures. Moreover, the magnetic structure can induce a weak link in the superconducting film, or be positioned directly ab…
Effect of urethane based bonding agent on the cure characteristics and mechanical properties of natural rubber/whole tyre reclaim–short nylon fiber composite have been studied. Tensile strength, tear strength, elongation at break, and heat build-up were studied in both orientations of the fibers. The processability as…
The nucleation behavior of poly(ε-caprolactone) (PCL) on friction-deposited poly(tetrafluoroethylene) (PTFE) was investigated by means of atomic force microscopy (AFM). This technique allows for imaging of the nucleation and crystallization processes in real time. An estimation of the PCL crystal orientation on the PT…